Canon EOS 5DS Instruction Manual page 336

K Protecting Images
Protecting Images with the <c> Button
During image playback, you can use the <c> button to protect an
image.
336
1 Select [m btn function].
Under the [53] tab, select [m
button function], then press <0>.
2
Select [Protect].
3 Select an image.
Press the <x> button to play back
images.
Turn the <5> dial to select the
image to be protected.
You can also select an image or
movie on the index display (p.327).
4
Protect the image.
When you press the <c> button,
the image will be protected and the
<K> icon will appear.
To cancel the image protection, press
the <c> button again. The <K>
icon will disappear.